Also to be a bit more objective, they don’t really know why you are there, they don’t know if you are going to make a scene and upset the people that are there to umm worship, so they did the most logical thing they could, they asked you to leave so they could avoid other people who in all honesty did have a right to be there from being upset or witnessing something unpleasant.
I believe he said "Hi".Which I admit is pretty threatening , but still, you'd think such a loving and tolerant organization would be willing to give the benefit of the doubt.As for their "logical" preemptive strike...why not just disfellowship all Witnesses before they do something wrong.That way no one will be threatened.Kind of "Minority Report" Witness style.Additionally,he also had the "right" to be there.And just who was it in this scene that made a decision to upset someone or become unpleasant ? I'm not trying to be hard on you here but let's not make irrational excuses for the heavy-handed tactics of the org.